Merge pull request #466 from nextcloud/backport/465/stable19

[stable19] Add missing TarHeader.php
nextcloud · Jul 2, 2020 · 195aa85 · 195aa85
2 parents eeffe47 + 82e907b
commit 195aa85
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diff --git a/composer/autoload_classmap.php b/composer/autoload_classmap.php
@@ -2917,6 +2917,7 @@
     'ZipStreamer\\UNIX' => $vendorDir . '/deepdiver/zipstreamer/src/ZipStreamer.php',
     'ZipStreamer\\ZipStreamer' => $vendorDir . '/deepdiver/zipstreamer/src/ZipStreamer.php',
     'bantu\\IniGetWrapper\\IniGetWrapper' => $vendorDir . '/bantu/ini-get-wrapper/src/IniGetWrapper.php',
+    'ownCloud\\TarStreamer\\TarHeader' => $vendorDir . '/deepdiver1975/tarstreamer/src/TarHeader.php',
     'ownCloud\\TarStreamer\\TarStreamer' => $vendorDir . '/deepdiver1975/tarstreamer/src/TarStreamer.php',
     'phpseclib\\Crypt\\AES' => $vendorDir . '/phpseclib/phpseclib/phpseclib/Crypt/AES.php',
     'phpseclib\\Crypt\\Base' => $vendorDir . '/phpseclib/phpseclib/phpseclib/Crypt/Base.php',

diff --git a/composer/autoload_static.php b/composer/autoload_static.php
@@ -3437,6 +3437,7 @@ class ComposerStaticInit2f23f73bc0cc116b4b1eee1521aa8652
         'ZipStreamer\\UNIX' => __DIR__ . '/..' . '/deepdiver/zipstreamer/src/ZipStreamer.php',
         'ZipStreamer\\ZipStreamer' => __DIR__ . '/..' . '/deepdiver/zipstreamer/src/ZipStreamer.php',
         'bantu\\IniGetWrapper\\IniGetWrapper' => __DIR__ . '/..' . '/bantu/ini-get-wrapper/src/IniGetWrapper.php',
+        'ownCloud\\TarStreamer\\TarHeader' => __DIR__ . '/..' . '/deepdiver1975/tarstreamer/src/TarHeader.php',
         'ownCloud\\TarStreamer\\TarStreamer' => __DIR__ . '/..' . '/deepdiver1975/tarstreamer/src/TarStreamer.php',
         'phpseclib\\Crypt\\AES' => __DIR__ . '/..' . '/phpseclib/phpseclib/phpseclib/Crypt/AES.php',
         'phpseclib\\Crypt\\Base' => __DIR__ . '/..' . '/phpseclib/phpseclib/phpseclib/Crypt/Base.php',

diff --git a/deepdiver1975/tarstreamer/src/TarHeader.php b/deepdiver1975/tarstreamer/src/TarHeader.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace ownCloud\TarStreamer;
+
+class TarHeader {
+	private $name = '';
+
+	private $mode = '777';
+
+	private $uid = '0';
+
+	private $gid = '0';
+
+	private $size;
+
+	private $mtime = '';
+
+	private $checksum;
+
+	private $typeflag;
+
+	private $linkname = '';
+
+	private $magic = 'ustar';
+
+	private $version = '00';
+
+	private $uname = '';
+
+	private $gname = '';
+
+	private $devmajor = '';
+
+	private $devminor = '';
+
+	private $prefix = '';
+
+	private $reserved = '';
+
+	public function setName($name){
+		$this->name = $name;
+		return $this;
+	}
+
+	public function setSize($size){
+		$this->size = $size;
+		return $this;
+	}
+
+	public function setMtime($mtime){
+		$this->mtime = $mtime;
+		return $this;
+	}
+
+	public function setTypeflag($typeflag){
+		$this->typeflag = $typeflag;
+		return $this;
+	}
+
+	public function setPrefix($prefix){
+		$this->prefix = $prefix;
+		return $this;
+	}
+
+	public function getHeader(){
+		$fields = [
+			['a100', substr($this->name, 0, 100)],
+			['a8', str_pad($this->mode, 7, '0', STR_PAD_LEFT)],
+			['a8', decoct(str_pad($this->uid, 7, '0', STR_PAD_LEFT))],
+			['a8', decoct(str_pad($this->gid, 7, '0', STR_PAD_LEFT))],
+			['a12', str_pad(decoct($this->size), 11, '0', STR_PAD_LEFT)],
+			['a12', str_pad(decoct($this->mtime), 11, '0', STR_PAD_LEFT)],
+			// We calculate checksum later
+			['a8', ''],
+			['a1', $this->typeflag],
+			['a100', $this->linkname],
+			['a6', $this->magic],
+			['a2', $this->version],
+			['a32', $this->uname],
+			['a32', $this->gname],
+			['a8', $this->devmajor],
+			['a8', $this->devminor],
+			['a155', substr($this->prefix, 0, 155)],
+			['a12', $this->reserved],
+		];
+
+		// pack fields and calculate "total" length
+		$header = $this->packFields($fields);
+
+		// Compute header checksum
+		$checksum = str_pad(decoct($this->computeUnsignedChecksum($header)), 6, "0", STR_PAD_LEFT);
+		for ($i = 0; $i < 6; $i++){
+			$header[(148 + $i)] = substr($checksum, $i, 1);
+		}
+		$header[154] = chr(0);
+		$header[155] = chr(32);
+
+		return $header;
+	}
+
+	/**
+	 * Create a format string and argument list for pack(), then call pack() and return the result.
+	 *
+	 * @param array $fields key being the format string and value being the data to pack
+	 * @return string binary packed data returned from pack()
+	 */
+	protected function packFields($fields){
+		list ($fmt, $args) = ['', []];
+
+		// populate format string and argument list
+		foreach ($fields as $field){
+			$fmt .= $field[0];
+			$args[] = $field[1];
+		}
+
+		// prepend format string to argument list
+		array_unshift($args, $fmt);
+
+		// build output string from header and compressed data
+		return call_user_func_array('pack', $args);
+	}
+
+	/**
+	 * Generate unsigned checksum of header
+	 *
+	 * @param string $header
+	 * @return string unsigned checksum
+	 */
+	protected function computeUnsignedChecksum($header){
+		$unsignedChecksum = 0;
+		for ($i = 0; $i < 512; $i++){
+			$unsignedChecksum += ord($header[$i]);
+		}
+		for ($i = 0; $i < 8; $i++){
+			$unsignedChecksum -= ord($header[148 + $i]);
+		}
+		$unsignedChecksum += ord(" ") * 8;
+
+		return $unsignedChecksum;
+	}
+}